Fungicide Efficacy in Peach Rusty Spot Control in Serbia
Efikasnost fungicida za suzbijanje prouzrokovača rđaste mrežavosti plodova breskve u Srbiji
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Author
Dolovac, Nenad
Miletic, Novica
Aleksic, Goran
Savic, Dusan
Zivkovic, Svetlana
Trkulja, Nenad
Bulajic, Aleksandra
Keywords
Peach Rusty SpotThe efficacy of fungicides
Kresoxim-methyl
Flusilazole
Sulfur
Rđasta mrežavost plodova breskve
efikasnost fungicida
kresoksim-metil
fluzilazol
elementarni sumpor
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Show full item recordAbstract
Rusty Spot has long been known as a harmful peach disease in many parts of the
world. During the past several years, rusty spot infection of the late-maturing peach cultivars
(Summerset, Suncrest, Fayette and O’Henry) caused significant yield losses in Serbia.
Although the etiology of the disease is still unknown, there are numerous studies attempting
to set a strategy for its control and recommend appropriate chemical and other peach
protection methods. However, because of specific environmental conditions in Serbia, recommended
protection method using repeated fungicide treatments, starting from petal
fall, did not prove to be efficient and the rate of infection in some susceptible peach cultivars
reached 100%. In 2003 and 2004 a field trial was conducted in order to test the efficacy
of fungicides (a.i. kresoxim-methyl, flusilazole and sulfur) for the efficient control of
Rusty Spot epidemics. The trial was carried out under conditions of natural infection on
the peach cv. Summerset at the locality of Bela Crkva, Serbia. In the untreated control plots,
high disease incidence was recorded with the percentage of affected fruit surface ranging
from 33.5% in the first, up to the 35.4% in the second year of the trail. Among fungicides
included in the trial, kresoxim-methyl proved to be the most efficient (90.25% in the first
and 91.12% in the second year of the trial), flusilazole exhibited lower efficacy (87.28% and
80.61%, respectively) while sulfur was the least efficient (82.33% and 80.30%, respectively).
Determination of the most efficient fungicide for the peach rusty spot control in Serbia provides
basic information for further investigations which will include optimization of treatment
terms, as well as additional agro-technical control measures. Rđasta mrežavost plodova breskve odavno je poznato i ekonomski značajno oboljenje
u mnogim delovima sveta. U Srbiji tokom proteklih godina ovo oboljenje nanosi značajne
štete na poznim sortama breskve (Summerset, Suncrest, Fayette i O’Henry). Mada etiologija
bolesti nije poznata, brojna istraživanja u mnogim delovima sveta pokušavaju da uspostave
strategiju za kontrolu i preporuče odgovarajuće hemijske i druge metode zaštite breskve.
U agroekološkim uslovima Srbije strategija primenjena u svetu, da suzbijanje prouzrokovača
rđaste mrežavosti treba sprovoditi u višekratnim tretmanima od fenofaze precvetavanja,
nije dala zadovoljavajuće rezultate. U pojedinim godinama zaraza plodova osetljivih sorti
breskve dostiže 100%. U periodu od 2003. do 2004. godine, ispitivana je efikasnost tri fungicida
(kresoksim-metil, fluzilazol i elementarni sumpor) u cilju iznalaženja mogućnosti uspešnije
zaštite breskve od prouzrokovača rđaste mrežavosti plodova. Ogled je izveden na
breskvi, sorte Summerset, u uslovima prirodne zaraze na lokalitetu Bela Crkva. Intenzitet zaraze
rđaste mrežavosti plodova na osnovu procenta zahvaćene površine plodova, u kontrolnim
parcelama kretao se od 33,5% u prvoj do 35,4% u drugoj godini ispitivanja. Tokom
obe godine ispitivanja kresoksim-metil ispoljio je najveću efikasnost (90,25% u prvoj, odnosno
91,12% u drugoj godini ispitivanja), nižu fluzilazol (87,28%, odnosno 87,61%) i najnižu
elementarni sumpor (82,33%, odnosno 80,30%). Određivanje fungicida sa najefikasnijim delovanjem
prema prouzrokovaču rđaste mrežavosti plodova breskve u Srbiji predstavlja preduslov
za dalja ispitivanja koja će uključiti pre svega optimizaciju rokova fungicidnih tretmana
kao i određivanje drugih agrotehničkih mera kontrole.